Reversing furnace and method of operating the same



Oct; 16, 1928; 1,687,710!

w.- DE'FRIES REVERSING FURNACE AND METHOD OF OPERATING THE SAME Filed DeC l. 1920 4 Sheets-Sheet 1 ma /l Gumm Oct. 16: 1928.

W. DE FRIES REVERSING FURNACE AND METHOD OF OPERATING THE SAME 4 Sheets-Shet Filed Dec. 1929 W Gm wage.

' oct. 16, 1928.

' W. DE FRIES REVERSING FURNACE AND METHOD OF OPERATING THE SAME Filed Dec. 1- 1920 4 Sheets-Sheet 5 gvwemifoc 0Q Cjg J r1 1 r Oct. 16, 1928. 1,687,710

w. DE FRIES REVERSING FURNACE AND METHOD OF OPERATING THE SAME 4 Sheets-Sheet 4 Filed Dec. 1- 1920 A? attouwq P T Petenteoi d eta ilppliceti iiiiec'l Hosea":

Figure 1 is verucai section of: one end portion of an. open heart-h furnace enihod v ing my invention;

Figure 2 is s trensverse section ta zen the line i Ti m Figures 8 and side eievations she n, grammatically the actuatin c; the reguistors at ti. we ends o;

Figures 5 and o respectiveiy on the 0t igure 1,

My invention has reiation to reversing generative furnaces, end more particni i to furnaces of this type, such as open-he; to steel furnaces in which gas is used as the tuei,

Her toi ore in the construction of fUIIMCQS oi" the type to which my invention relates, the ports at the ends of the furnace have been designed with respect to the doubts function which they perform, namely, both as intake and outtake ports, it being necessary to use the same poi": opening" for both purposes, its is weii known, the voiume 0t outgoing gases is, due to the expansion, greater than the voiume of the incoming air and gas, Therefore, it has been necessary to design ports out a size necessary to take care of the outgoing gases, rather than with respect to their most efficient action as e mixing passage for the incoming air and gas.

The object of my invention is to provide the end ports with regulating; means, the position of which can he changed, at with and which will enable each port, during; the period that it is being used as an intake port, to function. in a more efficient manner with respect to bringing together and mixing the incoming}; sir and gas. The reguietors are so arranged that when their position is changed upon reversal of the furnace, they provide a normai port tor the oiitake of the products of combustion,

The nature of my invention wiii he best understood by reference to the accompanying drawings, in which i have shown a preferred embodiment thereof and which wiii now he described, it being premised, how ever, that the invention is suscegtihie oi various other embodiments and may be widely changed within the spirit and scope oi my broader claims.

Referring first to that form of my inven tion shown in Figures 1, 2, 3, i, 5 and 6, the

,,, l. A RECUODS it,

nes W V Vi individual requirements for the shape 01 constru t1 us re consist oody on iii J ermed with e series of main sir 4 assages 9, tending; therethrou (another series euxiiiary a' sages it i adine iawer ievei, two or passages that posit-i *3 the port 42 the sir upts ieads; he said. tractor; body is aiso provided with series of eas ports 11, which have verticzdv nortions' communicating with the gas upteife 2, intermediate the secondary air pe s 1G, and with horizontai portions which discharge into the furnace proper points shove 9.55; intermediate the said auxiiiary ports, as indicated at 12. The form and arrangement of these ports will he cieariy understood from Figures 1, 2, 5 and 6, although it is to he un-- derstood that their particuiar form end i angeinent may be widely modified, to suit the the flame. The comparativeiy smsii air and gas ports in the mixing device or regniator are effective for separately increasing the velocity of the smelt streams produced, These streams at this high velocity are tater brought into contact to produce the desired fiance.

The regulator at each end of the furnace is suita'niy seated, preferably in e watercooied frame 13, arranged in the Waiis of each port 4, said frame forming guiding and seat-- ing means tor the cage and in which the ca can he moved verticeiiy by any suitah means.

Any suitahie system of circulating connections, such as those indicated at 1%, may he provided for maintaining the circuiation of water or other cooiing fluid through the seat ES or pas trough at into which.

con muni at one end with ing and guiding frame, also through the frame of the regulator. Inasmuch as in the operation of the furnace, the regulator at one end of the port will be in down position, such as shown in Figure 1, while that at the opposite end will be in a raised position, as shown in Figure l, l preferably connect the two regulators, so that one will act as a counterbalance to the other. This may be done by means of cables 15 (see Figures 3 and 4) which are connected to the respective regulators, and also to a centrally arranged equalizer device 16. To this equalizerare connected the plungers of the two actuating cylinders l7 and 18, one of which is shown at each end of the furnace.

It will be readily understood from Figures.

3 and 4 that if one of the regulators is lowered, this lowering action will assist in raising the regulator at the other end of the furnace.

The advantages of my invention will be apparent, since it provides simple and practical means by which the size of the port at the incoming end of the furnace can be made to give the best results in the proper mixing of the air and gas, irrespective of the ofltake function of the port, while at the same time, the regulators can-be quickly moved to positions in which each port has its full normal cross sectional area when acting as the offtake port. in the form of my invention shown and described, the air and gas passages can be so arranged with respect to each other as to give a most eilicient mixing action to the gas and air, prior to combustion, and thus greatly increase the efficiency of the furnace.

claim:

1. A reversing furnace having a port at eachend, with both fuel and air supply connections, and a structure having separate fuel and air ports movable at will into and out of each of said ports. and forming an inlet when in operative position, substantially as described.

2. A. reversing furnace having a port provided with both fuel and air connections, and a structure movable at will into and out of operative position in said port, said structure having inlet ports therein separately registering with said connections, substantially as described.

3. En a reversing regenerative furnace, the combination with an end port having air and connections leading thereto, of a regulating device movable across said port, said regulating device having air passages communicating with the air uptake and gas passages communicating with the gas uptake, substantially as described.

4;. in a reversing regenerative furnace, the combination with an end port having air and gas connections leading thereto, of a regulat ing device movable aci said port, said regulating device having air passages communicating with the air supply and gas passages communicating with the gas supply, said passages being in alternating relation to each other, substantially as described.

5. In a reversing regenerative furnace, the combination with an end port having air and gas connections leading thereto, of a regulating device movable across said port, said regulating device having air passages communicating with the air supply and gas passages communicating with the gas supply, said passages being in different vertical planes and in alternating relation to each other, substantially as described.

6. In a reversing regenerative furnace, the combination with an .end port having gas and air supply passages leading thereto, of a regulator movable across said port, said regulator'having a series of gas ports communicating with the gas supply passage and two series of air ports communicating with the air supply passage, substantially as described.

7. In a reversing regenerative furnace, the combination with an end port having gas and air supply passages leading thereto, of a regulator movable across said port, said regulater having a series of as ports communicating with the gas supp y passage and two series of air ports communicating with the air supply passage, one set of air ports being above and the other set being below the gas ports, substantially as described.

8. in a reversing regenerative furnace, the. combination with an end port having gas and air supply passages leading thereto, of a regulator movable vertically across said port, said regulator having air and gas port openings therethrough, substantially as described.

9. In a reversing regenerative furnace, the combination with an end port having gas and air passages leading thereto, of a regulator movable at willacross said port, said regulator comprising a metallic water-cooled frame and a refractory body or filling, and said regulator having air and gas inlet ports formed therethrough substantially as described.

10. In a reversing regenerative furnace, the combination with an end port having gas and air passages leading thereto, of a regu later movable at will across said port, said regulator comprising a metallic water-cooled frame and a refractory body or filling, and said regulator having a plurality of ports or passages therethrough which communicate respectively with the air and gas supply passages, substantially as described.

ll. In a reversing regenerative furnace, the combination with end ports, of regulators, one for each of said ports and movable at will across the respective ports, motive means for shifting said regulators, and a counterbalance connection between the regulators,

' each of said regulators having gas and. air

inlet openings therethrough, substantially as described.

12. In a reversing regenerative furnace, the combination with an end port having gas and air passages leading thereto, of a regulator movable at will across said port, said regulator comprising a metallic water-cooled frame and a refractory body or filling, and said regulator having a plurality of ports or passages therethrough which communicate respectively with the air and gas supply passages and which are so arranged in relation to each other as to give the flame a certain predetermined shape, substantially as. described.

13. A reversing furnace having a combined inlet and outlet port, and a member movable at will across said port, said member having a plurality of air and gas ports therein, substantially as described.

14. In a reversing regenerative furnace, the combination with a combined air and fuel inlet and waste gas offtake port, having air,

- fuel, and waste gas connections leading thereto, of a regulator device movable at will across said port and containing passages for the incoming fuel and air, of a cross-sectional area different from the cross-sectional area of the connections leading from said port and of which the passages form a. continuation when th said device is in operating position, substantially as described.

15. The method of operating reversing furnaces, which comprises placing a mixing device in the path of incoming elements of combustion to break up the same into a. series of small streams, removing said mixing de-v vice, and reversing the furnace, substantially as described. 1

16. The method of operating reversing furnaces, which comprises placing a. mixing device in the path of the incoming elements of combustion to break up the same into a series of small streams, preheating at least one of the elements of the combustion mixture, re-

moving the mixing device, and reversing the furnace, substantially as described.

17. The method of operating reversing furnaces, which comprises placing a mixing device in the path of the incoming elements of combustion to break up the same into a series of small streams, increasing the velocity of said streams, bringing said high velocity streams into contact, removing said mixing device, and reversing the furnace, substantially as described.

18. The method of operating reversing furnaces, which comprises supplying elements of combustion to a point adjacent the furnace in a plurality of streams, increasing the number of said streams and separately increasing the velocity of said elements, and thereafter bringing said elements into contact with each other within the furnace, substantially as described.

19. The method of operating reversing furnaces, which comprises supplying elements of combustion to a point adjacent the furnace in a plurality of streams, preheating at least one of said elements of combustion before it reaches the furnace, separately increasing both the numberof streams and the velocity of said elements of combustion, and thereafter bringing said elements into contact with each other within the furnace, substantially as described.

20. The method of operating reversing furnaces, which comprises placing a mixing device in the path of the incoming elements of combustion to break up the same into a series of small streams, preheating at least one of the elements of the combustion mixture, increasing the velocity of said streams, bringing said high velocity streams into contact with each other within the furnace, removing the mixing device, and reversing the furnace, substantially as described.

In testimony whereof, I have hereunto set my hand.

WALTER DE FRIES: 

